Fuse for projectiles



Aug 17 1926a n 1,596,378

V. SCHLAFER FUSE FOR PROJECTILES Original Filed Nov. 19, 1924 Z;/ l/enz dfi vazzmfz'w Jazzy Patented Aug. l7, 1926.

entree VALENTIN' SCHIIKFER, 011i BHEINISCEE ME EALTJLV DEREK-DORE, GERMAN SAMMERDA, THURINGIA, GERMAN- ASSIGNOR TO A. CORCEGIR ATIOH GF FUSE FOR PEOJECTILES.

Original application filed November 1?,

This is adivision of applicants parent application, filed November 19, 1924, Ser. ho. 750,894.

in fuses for projectiles for firing. at aircraft at great heights, the arrangement has already been proposed by which the inflammable material of the composition ring is not in connection with the external. air by radially and externally directed borings or passages, since in consequence of the great speed of rotation in conjunction with the greatly diminished density of the air in. the upper strata of the atmosphere, the introduction of the oxygen necessary for the combustion of the powder is decreased and is so reduced that combustion of the material of the ring is delayed and the flame may even be extinguished. Instead of. lateral openings for introducing a longitudinal passage has been provided which leads into a conical shaped spaoe open in front. The air in the hollow space and the passage leading therefrom to the composition is compressed in consequence of the high forward velocity. The initial ignition device was protected on that account within the hollow cap shaped discharge space for the fuse gases by a cap completely closing it in the usual manner against external influences.

fill must, however, be allowed. to enter at the point of the fuse at the beginning of the flight of the projectile. The entrance of foreign bodies, of dust, moisture and the like to the composition rings must, however, be prevented during the mounting and while protected before actual use, in order to prevent the passages for introducing the air from being choked, and to prevent any change of the particles of the ignition comaosition. If the front opening of the fuse hotly should be closed for this purpose, this closing device must be removed before using the projectile; this device might lee forgotten, and in any event has proven troublesome, and as a matter of fact such a closing device has not been used up to the present time for that very reason.

The invention provides such device, but ensures that no special manipulation is required, in order that at the moment of firing air should be introduced into the air to the composition rings,

1324, Serial No. 750,884,. and. in Germany December 1, 1923. Dividedland. this application filed February 5, 1926.

SeriaLNo. 86,274..

interior. of the. fuse. A. thin small plate is secured in known manner at the circular opening of' the fuse, as has previously been known in fuses with plungers, but in this latter case. it serves a different purpose and nust be intact. during the flight of the projectile in order to keep off the air pressure from the plunger, and only at the moment of impact of. the projectile, and by means of thisv is destroyed. The inventionconsists, therefore, in the employment of a small closing plate for the front opening. by which air isintroduced into the fuse, which is independent of the necessary covering. of the ignition device by a plunger, and in the ntomatic disruption of this plate at the moment of firing the projectile and. in. the means for accomplishing this.

Referring now to the drawing in which. like reference characters refer. to correspond-- ing parts throughout:

Figure l is a longitudinal section of a projectile cap, and

2- is a side view showing a portion broken away.

The projectile cap is provided with a plunger a which projects into the hollow space (1. From this hollow space (Z longitudinal air passages 0 lead to the composition while the space at the forward end is separated from the external atmosphere by a small thin plate g. The plunger is also provided with a detonator i. The plunger a is soldered or otherwise fastened to the plate g so that on the relative backward movement of the plunger due to the initial shock on firing the projectile, the small plate 9 will be carried with the plunger, and is thus drawn out of or torn from its peripheral fastening. Thus a free opening is established at the front end of the hollow space (Z and consequently communication with the external air is established. Fig. 1 shows the position of the parts before firing and Fig. 2 shows the parts just after firing.

The invention which is described above for a time fuse can naturally also be employed in combination fuses with time and impact ignition.

I claim as my invention:

1. A fuse for projectiles for firing at objects at great heights comprising a fuse body having an opening therein; a thin plate for closing said opening; and a movable fuse composition in said body secured to said thin plate, said movable composition being adapted to be moved due to the set back of the projectile in order to destroy the thin plate to thus allow air to enter the opening.

2. A fuse for projectiles for firing at objects at great heights comprising a fuse body having an opening therein; a thin plate for closing said opening, said fuse body having an air passage therein leading to the explosive mixture; and a movable fuse composition in said body secured to said thin plate, said movable composition being adapted to be moved due to the set back of the projectile in order to destroy the thin plate to thus allow air to enter the opening and passage.

3. A fuse for projectiles for firing at objects at great heights comprising a fuse body having an opening therein; a thin plate for closing said opening; and means secured'to said thin plate and being adapted to be moved due to the set back of the pro jeotile in order to remove the thin plate from the opening'to thus allow air to enter the opening. 7

4. A fuse for projectiles for firing at objects at great heights comprising a fuse body having an opening therein; a thin plate for closing said opening, said fuse body having an air passage therein leading to the explosive mixture; and means secured to said thin plate and being adapted to be moved due to the set back of the projectile in order to remove the thin plate from the opening to thus allow air to enter the open- 1n g A fuse for projectiles for firing at objects at great heights comprising a fuse body having an opening therein; a thin plate for closing said opening; a plunger in said body secured to said thin plate, said plunger being adapted to be moved due to the set back of the projectile in order to destroy the thin plate to thus allow air to enter the opening; and a detonator in said plunger.

6. A fuse for projectiles for firing at objects at great heights comprising a fuse body having an opening therein; a thin plate for closing the opening, said fuse body having an air passage therein leading to the explosive mixture; a plunger in said body secured to said thin plate, said plunger being adapted to be moved due to the set back of the projectile. in order to destroy the thin plate to thus alloW air to enter the opening and passage; and a detonator in said plunger.

In testimony whereof, I atfix my signature.

VALENTIN SGHLAFER. 

